Mechanical Engineering GATE 2014 Set-4 Questions with Answer

Ques 1 Engineering Mathematics


Which one of the following equations is a correct identity for arbitrary 3×3 real matrices P, Q and R?

A

P(Q+R)=PQ+RP

B

(P-Q)2=P2-2PQ+Q2

C

det(P+Q)=det P+det Q

D

(P+Q)2=P2+PQ+QP+Q2


Ques 2 Engineering Mathematics


The value of the integral is

A

3

B

0

C

-1

D

-2


Ques 3 Engineering Mathematics


The solution of the initial value problem
dy/dx = -2xy; y(0)=2 is

A

1+e-x2

B

2e-x2

C

1+ex2

D

2ex2


Ques 4 Engineering Mathematics


A nationalized bank has found that the daily balance available in its savings accounts follows a normal distribution with a mean of Rs. 500 and a standard deviation of Rs. 50. The percentage of savings account holders, who maintain an average daily balance more than Rs. 500 is __________.

50 is the correct answer.


Ques 5 Engineering Mathematics


Laplace transform of cos(ωt) is s/(s22). The Laplace transform of e-2tcos(4t) is

A

(s-2)/((s-2)2+16)

B

(s+2)/((s-2)2+16)

C

(s-2)/((s+2)2+16)

D

(s+2)/((s+2)2+16)


Ques 6 Engineering Mathematics


If z is a complex variable, the value of an integral is given as ∫3i5 d(z) dz. What is its value?

A

-0.511-1.57i

B

-0.511+1.57i

C

0.511-1.57i

D

0.511+1.57i


Ques 7 Engineering Mathematics


The value of is

A

1/2(e-1)

B

1/2(e2-1)

C

1/2(e2-e)

D

1/2(e - 1/e)2


Ques 8 Engineering Mathematics


The number of accidents occurring in a plant in a month follows Poisson distribution with mean as 5.2. The probability of occurrence of less than 2 accidents in the plant during a randomly selected month is

A

0.029

B

0.034

C

0.039

D

0.044


Ques 9 Engineering Mathematics


Consider an ordinary differential equation dx/dt = 4t+4. If x=x0 at t=0, the increment in x calculated using Runge-Kutta fourth order multi-step method with a step size of Δt=0.2 is

A

0.22

B

0.44

C

0.66

D

0.88


Ques 10 General Aptitude


Which of the following options is the closest in meaning to the word underlined in the sentence below?
In a democracy, everybody has the freedom to disagree with the government.

A

dissent

B

descent

C

decent

D

decadent


Ques 11 General Aptitude


After the discussion, Tom said to me, 'Please revert!'. He expects me to

A

retract

B

get back to him

C

move in reverse

D

retreat


Ques 12 General Aptitude


While receiving the award, the scientist said, "I feel vindicated". Which of the following is closest in meaning to the word 'vindicated'?

A

punished

B

substantiated

C

appreciated

D

chastised


Ques 13 General Aptitude


Let f(x,y) = xnym = P. If x is doubled and y is halved, the new value of f is

A

2n-mP

B

2m-nP

C

2(n-m)P

D

2(m-n)P


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